57 

 THE RESPIRATORY SYSTEM. 



tABORATOEY WORK FOR THE WEEK. 



References : 

 Points for Quiz : 

 Laboratory Report : 



Due : 



Go to the delivery desk for (a) assigned slide, 121 ; {b') paraf- 

 fin section, 128 ; {c) colodion sections, 122, 123 ; (a?) sections ready 

 to mount, 124, 126 ; (^) prepare 125. 



(10) Soft palate. Cat. Assigned for study. The nasal 

 side of the soft palate will afford a demonstration of the ciliated epi- 

 thelium of the nasal fossae. This will be spoken of in your text 

 book as a stratified' ciliated epithelium. Compare it with the epithe- 

 lium in the trachea. 



LARYNX. 



121. Larynx. . Assigned for study. lyongisec- 

 tion. ; collodion ; sections }x. Hematoxylin and 

 picrofuchsin. Understand what structures are shown in the section. 

 Of the cartilages shown in the section, the first is the hyoid, the sec- 

 ond the thyroid, followed by the cricoid and the rings of the trachea. 

 Identify the true and false vocal cords and the ventricle of the larynx. 

 Note the character of the epithelium in the different regions, i. e. , 

 in the ventricle and upon the false and true vocal cords. Are glands 

 present ? Where are they located ? Note also the structure of the 

 mucous membrane and its variation in the different regions. 



TRACHEA. 



122. Trachea. Cat (young). Transection. Picric alcohol ; 

 collodion ; sections ^. Stain with hematoxylin and picro- 

 fuchsin. 



Identify the three coats of the trachea, (/) the mucous coat, 

 (2) the submucous coat, (j) the fibrous coat with its incomplete 



